One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,9)(4,12)(5,7)(6,11)(8,13)(10,16)(14,15)(18,23)(19,27)(20,29)(21,30)(24,31)(25,32)(26,28) involution — undirected(4,13)(8,12)(9,16)(11,14)(17,18)(19,28)(20,24)(21,31)(22,26)(23,29)(25,30)(27,32) involution — undirected(1,3)(2,6)(4,14)(5,10)(7,15)(8,16)(9,12)(11,13) involution — undirected(2,7)(6,15)(8,12)(9,16)(17,19,21,20,22,29,30,27)(18,24,25,28,26,32,31,23)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.